The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia
Thermal and surface offsets describe mean annual ground temperature relative to mean annual air temperature, and for permafrost modelling they are often predicted as a function of surface characteristics and topography. As macroclimatic conditions influence the effectiveness of the underlying proces...
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Copernicus Publications
2015
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Online Access: | https://doi.org/10.5194/tc-9-1025-2015 http://www.the-cryosphere.net/9/1025/2015/tc-9-1025-2015.pdf https://doaj.org/article/080b93c3c6bd483cb74b685cf553aa5c |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:080b93c3c6bd483cb74b685cf553aa5c 2023-05-15T17:56:42+02:00 The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia A. Hasler M. Geertsema V. Foord S. Gruber J. Noetzli 2015-05-01 https://doi.org/10.5194/tc-9-1025-2015 http://www.the-cryosphere.net/9/1025/2015/tc-9-1025-2015.pdf https://doaj.org/article/080b93c3c6bd483cb74b685cf553aa5c en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-9-1025-2015 http://www.the-cryosphere.net/9/1025/2015/tc-9-1025-2015.pdf https://doaj.org/article/080b93c3c6bd483cb74b685cf553aa5c undefined The Cryosphere, Vol 9, Iss 3, Pp 1025-1038 (2015) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.5194/tc-9-1025-2015 2023-01-22T18:10:31Z Thermal and surface offsets describe mean annual ground temperature relative to mean annual air temperature, and for permafrost modelling they are often predicted as a function of surface characteristics and topography. As macroclimatic conditions influence the effectiveness of the underlying processes, knowledge of surface- and topography-specific offsets is not easily transferable between regions, limiting the applicability of empirical permafrost distribution models over areas with strong macroclimatic gradients. In this paper we describe surface and thermal offsets derived from distributed measurements at seven field sites in British Columbia. Key findings are (i) a surprisingly small variation of the surface offsets between different surface types; (ii) small thermal offsets at all sites (excluding wetlands and peat); (iii) a clear influence of the micro-topography at wind exposed sites (snow-cover erosion); (iv) a north–south difference of the surface offset of 4 °C in vertical bedrock and of 1.5–3 °C on open (no canopy) gentle slopes; (v) only small macroclimatic differences possibly caused by the inverse influence of snow cover and annual air temperature amplitude. These findings suggest that topoclimatic factors strongly influence the mountain permafrost distribution in British Columbia. Article in Journal/Newspaper permafrost The Cryosphere Unknown The Cryosphere 9 3 1025 1038 |
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English |
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geo envir A. Hasler M. Geertsema V. Foord S. Gruber J. Noetzli The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
topic_facet |
geo envir |
description |
Thermal and surface offsets describe mean annual ground temperature relative to mean annual air temperature, and for permafrost modelling they are often predicted as a function of surface characteristics and topography. As macroclimatic conditions influence the effectiveness of the underlying processes, knowledge of surface- and topography-specific offsets is not easily transferable between regions, limiting the applicability of empirical permafrost distribution models over areas with strong macroclimatic gradients. In this paper we describe surface and thermal offsets derived from distributed measurements at seven field sites in British Columbia. Key findings are (i) a surprisingly small variation of the surface offsets between different surface types; (ii) small thermal offsets at all sites (excluding wetlands and peat); (iii) a clear influence of the micro-topography at wind exposed sites (snow-cover erosion); (iv) a north–south difference of the surface offset of 4 °C in vertical bedrock and of 1.5–3 °C on open (no canopy) gentle slopes; (v) only small macroclimatic differences possibly caused by the inverse influence of snow cover and annual air temperature amplitude. These findings suggest that topoclimatic factors strongly influence the mountain permafrost distribution in British Columbia. |
format |
Article in Journal/Newspaper |
author |
A. Hasler M. Geertsema V. Foord S. Gruber J. Noetzli |
author_facet |
A. Hasler M. Geertsema V. Foord S. Gruber J. Noetzli |
author_sort |
A. Hasler |
title |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_short |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_full |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_fullStr |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_full_unstemmed |
The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia |
title_sort |
influence of surface characteristics, topography and continentality on mountain permafrost in british columbia |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-1025-2015 http://www.the-cryosphere.net/9/1025/2015/tc-9-1025-2015.pdf https://doaj.org/article/080b93c3c6bd483cb74b685cf553aa5c |
genre |
permafrost The Cryosphere |
genre_facet |
permafrost The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 3, Pp 1025-1038 (2015) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-9-1025-2015 http://www.the-cryosphere.net/9/1025/2015/tc-9-1025-2015.pdf https://doaj.org/article/080b93c3c6bd483cb74b685cf553aa5c |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-9-1025-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
3 |
container_start_page |
1025 |
op_container_end_page |
1038 |
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1766164947703693312 |